Patent Number: 6,308,532

Title: System and process for the recovery of propylene and ethylene from refinery offgases

Abstract: A system and process for the recovery of ethylene and propylene from a gas stream, such as a refinery offgas stream. The process comprises withdrawing, cooling, and recovering an overhead vapor stream from a single distillation column. The process includes withdrawing a liquid C.sub.3 +, C.sub.4 +, C.sub.5 + or C.sub.6 + bottoms product stream and recycling a portion of the bottoms steam to maintain an overhead column condenser at temperature refrigeration levels of above -140.degree. F. and withdrawing a vapor side stream rich in propylene or ethylene-propylene.

Inventors: Hopewell; Richard B. (Medfield, MA)

Assignee: Chart Industries, Inc.

International Classification: C07C 7/00 (20060101); C07C 7/04 (20060101); C10G 70/00 (20060101); C10G 70/04 (20060101); C10G 70/06 (20060101); F25J 3/02 (20060101); F25J 001/00 ()

Expiration Date: 10/30/2018